OverviewWider Scroll Wheel: Wider scroll wheel provides finger fit comfort for long time use. Up to 12 Months Battery Life: Go longer between battery changes with energy efficient engineering. Extreme quality offer over 12 months lifetime guaranteed. Consistent Wireless Stability: Advanced 2.4 GHz powerful wireless connection with distance up to 10-15m. Auto Power Saving: Auto 4-level power saving. It will be in sleep mode in 0.2s of inactivity. 5M Clicks Lifecycle: Extreme quality offer over 5 million clicks guaranteed Silent Clicks (Model No.: FG12S): Keeps you focused on the task at hand and eliminates worry of bothering others around you 8-in-One: 8 gestures to perform selectable hotkey commands